I’ve been looking for Laddie but no luck so far. I got The Harvester, Girl of the Limberlost and Freckles for Christmas in 1965. LOL I’ve been looking for more ever since.
Or used: Stratton-Porter on ABE
ABE Books is a treasure trove. It's a consortium of used book dealers, and the prices are ROCK bottom. I got a Liber Usualis (all the Latin chant of the Church organized by the Church year) which is at least $100 normally, for 50. It's marked up and was stuffed full of holy cards, but it was a deal.